n8n-docs/docs/hosting/configuration/environment-variables/database.md

title	description	contentType	tags	hide
Database environment variables	Set up and configure databases with environment variables for your self-hosted n8n instance.	reference	environment variables	toc tags

Database environment variables

By default, n8n uses SQLite. n8n also supports PostgreSQL. n8n removed support for MySQL and MariaDB in v1.0.

This page outlines environment variables to configure your chosen database for your self-hosted n8n instance.

Variable	Type	Default	Description
DB_TYPE /_FILE	Enum string: sqlite, postgresdb	sqlite	The database to use.
DB_TABLE_PREFIX	*	-	Prefix to use for table names.

PostgreSQL

Variable	Type	Default	Description
DB_POSTGRESDB_DATABASE /_FILE	String	n8n	The name of the PostgreSQL database. Default value is n8n.
DB_POSTGRESDB_HOST /_FILE	String	localhost	The PostgreSQL host. Default value is localhost.
DB_POSTGRESDB_PORT /_FILE	Number	5432	The PostgreSQL port. Default value is 5432.
DB_POSTGRESDB_USER /_FILE	String	root	The PostgreSQL user. Default value is root.
DB_POSTGRESDB_PASSWORD /_FILE	String	-	The PostgreSQL password.
DB_POSTGRESDB_SCHEMA /_FILE	String	public	The PostgreSQL schema. Default value is public.
DB_POSTGRESDB_SSL_CA /_FILE	String	-	The PostgreSQL SSL certificate authority.
DB_POSTGRESDB_SSL_CERT /_FILE	String	-	The PostgreSQL SSL certificate.
DB_POSTGRESDB_SSL_KEY /_FILE	String	-	The PostgreSQL SSL key.
DB_POSTGRESDB_SSL_REJECT_UNAUTHORIZED /_FILE	Boolean	true	If n8n should reject unauthorized SSL connections (true) or not (false).

SQLite

Variable	Type	Default	Description
DB_SQLITE_VACUUM_ON_STARTUP	Boolean	false	Runs VACUUM{:target="_blank" .external-link} operation on startup to rebuild the database. Reduces file size and optimizes indexes. This is a long running blocking operation and increases start-up time.